Signals (increments) a semaphore.
- iOS 4.0+
- macOS 10.6+
- tvOS 9.0+
- watchOS 2.0+
The counting semaphore. This parameter cannot be
If the previous value was less than zero, this function wakes a process currently waiting.
Increment the counting semaphore. If the previous value was less than zero, this function wakes a thread currently waiting in